Keystones — Lintel
Five GCSE retrieval questions · 5 July 2016 · mathsvault.uk/keystones
-
1. Number Converting to standard form
Write 9,900,000 in standard form
Answer: 9.9 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + 3x - 40
Answer: (x + 8)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 21cm, angle = 54°. Find adjacent side. Give your answer to 2 decimal places
Answer: 12.34cm -
4. Ratio Mixed ratio problems
Orange and purple counters are in the ratio 14:7. What fraction of the counters are orange?
Answer: 2⁄3 -
5. Statistics Mean
Calculate the mean of: 44, 9, 32, 8, 36, 8, 42, 27
Answer: 25.75